tee

Redirect output to multiple files, copies standard input to standard
output and also to any files given as arguments. This is useful when you want
not only to send some data down a pipe, but also to save a copy.

If a file being written to does not already exist, it is created.
If a file being written to already exists, the data it previously contained
is overwritten unless the `-a' option is used."Twenty years from now, you will be more disappointed by the things you didn't
do than by the ones you did do. So throw off the bowlines, sail away from the
safe harbour. Catch the trade winds in your sails. Explore. Dream. Discover"
~ Mark
Twain

Related:

echo - Display message on screenhead - Output the first part of file(s)less - Display output one screen at a timemore - Display output one screen at a time
pg - Display one page at a time
Equivalents in NT Batch/Perl Script - TEE Scripts